30 Days to Build a 4x4 F100 for the Indy 500

This 1973 Ford F100 4x4 has 30 days to make it to the Indy 500 — and we just finished our part of the build. Spencer walks through the complete FF Chassis, interior kit, and custom wiring harness we shipped out in two weeks flat, before the truck heads to Vantage for final assembly.

The customer is Desnuda Tequila, and they want this truck on display at the Indy 500 on May 25th — possibly even taking a lap around the track before the race. That gave Vantage roughly two weeks on their end to bolt everything together, paint it, sort the patina, and put real miles on it before it loads onto a trailer headed to Indianapolis.

Our side of the project covered a full 4x4 FF Chassis, a Gen 4 Coyote with 10R80 transmission, F-150-style electronic transfer case, Curry 9-inch axles front and rear, Wilwood 14-inch brakes, Locked Off-Road coilovers, and a complete stainless exhaust system. Spencer breaks down the parallel front four-link, triangulated rear four-link, RPM steering components, Whipple supercharger running 5-7 pounds of boost, and the returnless fuel system routed through the frame rail.

The interior is a full cradle-to-grave FF Interior Kit — bench seat, door panels, kick panels, headliner, sun visors, and carpet — designed by Logan with a Native American-inspired pattern that plays off the truck's turquoise faux patina paint. Custom wiring harness built from scratch by our electrical engineer Doug in one week.
Going from nothing to a complete chassis, interior, and harness in two weeks isn't normal. Neither is what Vantage is about to pull off in Indianapolis. We'll have a follow-up video once the truck is running and at the show.

BUILD SPECS: (1973 Ford F100 4x4)
- FF Chassis 4x4
- Gen 4 Coyote 5.0 with Whipple Supercharger
- Ford Performance 10R80 10-Speed Automatic
- F-150 Electronic Transfer Case
- Curry Enterprises 9-inch Axles (Front and Rear), 35-spline chromoly
- Wilwood 14-inch Brakes
- Locked Off-Road Coilovers
- RPM Steering Components
- Redhead Steering Box
- Front Runner Serpentine Kit
- Boyd Welding 28-Gallon Aluminum Fuel Tank
- Mustang GT500 Fuel Pump
- FFG Stainless Headers and 3-inch Stainless Exhaust
- Magnaflow Mufflers
- FF Interior Kit
- Custom FFG 1973-1979 F100 Wiring Harness

Shout out to Vantage, Desnuda Tequila, and everyone on our chassis, upholstery, and engineering teams who made this happen.

Learn more about FF Chassis at fatfender.com/pages/ffgchassis or shoot us an email at [email protected].

Follow along for the finished truck and the Indy 500 update.
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